Craig Federighi and Dan Riccio are Apple's newest senior VPs.

Apple announced on Monday afternoon that it is promoting two long-time employees to senior vice president status. Craig Federighi will serve as senior vice president of Mac Software Engineering, while Dan Riccio will take over as senior vice president of Hardware Engineering for Bob Mansfield. Mansfield, who announced in late June that he would be retiring from Apple, has apparently decided to stay on with the company for the time being, continuing to work in hardware engineering. All three will report directly to CEO Tim Cook.

Federighi was previously vice president of Mac Software Engineering. As part of his promotion, he will also oversee Apple's common operating system engineering teams, which develop software shared across OS X and iOS platforms as well as its other devices such as AirPort WiFi base stations and various iPods. He previously worked at NeXT, Apple, and Ariba before returning to Apple in 2009.

Riccio previously served as vice president of Hardware Engineering under Mansfield prior to Monday's promotion, which had been anticipated since Mansfield announced his retirement in June. Riccio first joined Apple in 1998 as a vice president of Product Design, after Apple acquired his previous company, Raycer Graphics. Apple has characterized him as a "key contributor" to all of Apple's hardware designs since then, most recently as an "instrumental" contributor to the development of the iPad and its successive hardware redesigns.

Riccio and Mansfield have worked together closely on Apple's hardware in recent years, so the pair may have decided to keep working together even as Riccio transitions to taking over more of the day-to-day management work. It's not clear what Mansfield's official title will be—it's still listed as senior vice president of Hardware Engineering—but he will remain with the company to "work on future products," Apple said in a statement.